Which finding is not suggestive of urethral injury?

The absence of a palpable prostate on rectal examination is not suggestive of a urethral injury. In cases of urethral injury, particularly in males, examination findings may include bruising or hematomas in the perineal or scrotal areas, presence of blood at the external urethral meatus, and sometimes, blood in the rectal lumen.

The prostate's palpability can vary for many reasons and isn't specifically a direct indicator of urethral injury; factors such as a full bladder, the patient's position, or the presence of other injuries can influence the examination findings. Therefore, while blood in the meatus and associated hematomas suggest a possible rupture or injury to the urethra, the lack of palpable prostate is not a definitive sign of such an injury, making it an atypical finding in the context of urethral trauma.